EP1619540A1 - Anzeigeeinrichtung - Google Patents

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Publication number
EP1619540A1
EP1619540A1 EP03723231A EP03723231A EP1619540A1 EP 1619540 A1 EP1619540 A1 EP 1619540A1 EP 03723231 A EP03723231 A EP 03723231A EP 03723231 A EP03723231 A EP 03723231A EP 1619540 A1 EP1619540 A1 EP 1619540A1
Authority
EP
European Patent Office
Prior art keywords
brightness sensor
display surface
display device
mounting substrate
distance
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP03723231A
Other languages
English (en)
French (fr)
Other versions
EP1619540A4 (de
Inventor
Hideki Hashidume
Shigeo Hayashi
Masao Hatanaka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Totoku Electric Co Ltd
Original Assignee
Totoku Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Totoku Electric Co Ltd filed Critical Totoku Electric Co Ltd
Publication of EP1619540A1 publication Critical patent/EP1619540A1/de
Publication of EP1619540A4 publication Critical patent/EP1619540A4/de
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
    • G02F1/13318—Circuits comprising a photodetector
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1601—Constructional details related to the housing of computer displays, e.g. of CRT monitors, of flat displays
    • G06F1/1607—Arrangements to support accessories mechanically attached to the display housing
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/46—Fixing elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/58—Arrangements comprising a monitoring photodetector
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G09G2320/0633—Adjustment of display parameters for control of overall brightness by amplitude modulation of the brightness of the illumination source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/144—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light being ambient light
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/145—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen

Definitions

  • the present invention relates to a display device and more particularly to a display device wherein the brightness of its display surface can be measured accurately with a brightness sensor while controlling the effect of external light or the dispersion of the position of the brightness sensor.
  • a display device in which a brightness sensor is provided for measuring and automatically controlling the brightness of the display surface of the display device (for example, as disclosed in Europe Patent Publication EP1274066A1).
  • the brightness of the display surface can not be measured accurately due to the effect of the dispersion of the position of the brightness sensor and the external light.
  • An object of the present invention is to provide a display device wherein the brightness of the display surface can be measured accurately with a brightness sensor while controlling the effect of external light or the dispersion of the position of the brightness sensor.
  • a display device is comprising: a display unit having a display surface; a mounting substrate having a base portion mounted directly or via a mounting fitting to a frame of the display unit and a projected part projecting from a part of the base portion towards the display surface; and a brightness sensor mounted on the projected part to face the display surface.
  • the frame of the display unit has a thickness of, for example, 0.5 mm to 2 mm for maintaining the physical strength. Accordingly, when the mounting substrate is mounted to the front side (facing the outside) of the frame of the display unit and the brightness sensor having a thickness of, for example, 0.75 mm is mounted to the back side (facing the display surface) of the mounting substrate, the distance between the display surface and the brightness sensor is in the range from 1.75 mm to 3.25 mm. As explained later, the distance is too great to disregard the effect of external light or the dispersion of the position of the brightness sensor.
  • the fine adjustment of the distance is impossible. Therefore, when the mounting fitting is mounted to the frame of the display unit and the mounting substrate is mounted to the back side of the mounting fitting, the fine adjustment of the distance is possible due to the mounting condition of the mounting fitting. However, as the distance increases further, the effect of the external light or the dispersion of the position of the brightness sensor increases.
  • the display device has the mounting substrate provided with the projected part projecting from a part of the base portion towards the display surface and the brightness sensor mounted on the projected part.
  • the display device may be modified in which the mounting substrate is a stepped substrate in which the projected part is thicker than the base part (21a).
  • the display device of the second feature has the stepped substrate which can be made at higher precision, its overall dimensions can be increased in the accuracy.
  • the display device may be modified in which the distance z (mm) between the display surface and the brightness sensor is expressed by 0 ⁇ z ⁇ 1.6.
  • the display device of the third feature allows the distance z between the brightness sensor and the display surface to be not greater than 1.6 mm, it can control the effect of external light or the dispersion of the position of the brightness sensor.
  • the display device may be modified in which having the mounting fitting mounted to the frame of the display unit, the mounting substrate mounted to the back side of the mounting fitting, and the brightness sensor mounted to the projected part of the mounting substrate and when the distance between the display surface and the front side of the frame is L1 (mm), the thickness of the brightness sensor is t (mm), and the thickness of the base portion of the mounting substrate is b (mm), the distance L2 (mm) between the display surface and the back side of the mounting fitting is expressed by L1+b ⁇ L2 and the height d of the projected part from the base portion is expressed by L2-b-t-1.6 ⁇ d ⁇ L2-b-t.
  • the display device of the fourth feature also allows the distance z between the brightness sensor and the display surface to be not greater than 1.6 mm, it can control the effect of external light or the dispersion of the position of the brightness sensor.
  • the display device may be modified in which the distance z (mm) between the display surface and the brightness sensor is expressed by 0 ⁇ z ⁇ 1.
  • the display device of the fifth feature allows the distance z between the brightness sensor and the display surface to be not greater than 1 mm, it can control the effect of external light or the dispersion of the position of the brightness sensor.
  • the display device may be modified in which having the mounting fitting mounted to the frame of the display unit, the mounting substrate mounted to the back side of the mounting fitting, and the brightness sensor mounted to the projected part of the mounting substrate and when the distance between the display surface and the front side of the frame is L1 (mm), the thickness of the brightness sensor is t (mm), and the thickness of the base portion of the mounting substrate is b (mm), the distance L2 (mm) between the display surface and the back side of the mounting fitting is expressed by L1+b ⁇ L2 and the height d of the projected part from the base portion of the mounting substrate is expressed by L2-b-t-1 ⁇ d ⁇ L2-b-t.
  • the display device of the sixth feature allows the distance z between the brightness sensor and the display surface to be not greater than 1 mm, it can control the effect of external light or the dispersion of the position of the brightness sensor.
  • the display device may be modified in which when the sensitivity of the brightness sensor to the incident light received along the optical axis of the brightness sensor is 100 %, the brightness sensor has a sensitivity of 90 % or higher to the incident light falling at an angle of 20 degrees from the optical axis and a sensitivity of 70 % or higher to the incident light falling at an angle of 40 degrees from the optical axis.
  • the directivity of the brightness sensor is sharp, it is much influenced by the effect of the dispersion of the position of the brightness sensor and the external light.
  • the display device of the seventh feature has the brightness sensor having moderate directivity, it can control the effect of external light or the dispersion of the position of the brightness sensor. If it is influenced, it can be easily eliminated.
  • Fig. 1 is a block diagram of a circuitry arrangement of a liquid crystal display device (100) showing the first embodiment of the present invention.
  • the liquid crystal display device (100) comprises a display unit (10) including a liquid crystal panel (11) and a back light (23), a brightness sensor (22) disposed to face the display surface (11a) of the liquid crystal panel (11), and a control circuit (24) provided for controlling the intensity of the back light (23) in response to the brightness of the display surface (11a) measured with the brightness sensor (22).
  • Fig. 2 is a front view showing an external arrangement of the liquid crystal display device (100) .
  • the edge part of the display surface (11a) is covered with a bezel (15).
  • Fig. 3 is a front view of the liquid crystal display (100) where the bezel (15) has been removed.
  • the edge part of the display surface (11a) is covered with a frame (12) .
  • a mounting substrate (21) is mounted via a mounting fitting (30) to the frame (12).
  • the frame (12) and the mounting fitting (30) may be fabricated by sheet metal working.
  • the horizontal portion of the L shaped mounting fitting (30) is mounted to the upper side of the frame (12) with a screw (31) and the vertical portion of the mounting fitting hangs down over an upper portion of the display surface (11a).
  • the front side of the base portion (21a) of the mounting substrate (21) is attached with the solder (32) to the back side of the vertical portion of the mounting fitting (30).
  • the brightness sensor (22) of a chip form which is faced to the display surface (11a) is mounted to the projected part (21b) of the mounting substrate (21).
  • the center of the brightness sensor (22) is spaced from the edge of the frame (12) by a distance x (mm) along the horizontal and by a distance y (mm) along the vertical.
  • the distance between the display surface (11a) and the front side of the frame (12) is L1 (mm) and the distance between the display surface (11a) and the back side of the vertical portion of the mounting fitting (30) is L2 (mm).
  • the thickness of the base portion (21a) of the mounting substrate (21) is b (mm), and the height of the projected part (21b) from the base portion (21a) is d (mm) .
  • the thickness of the brightness sensor (22) is t (mm).
  • the surface of the brightness sensor (22) is spaced by a distance z (mm) from the display surface (11a).
  • the thickness of the solder (32) is included in the distance L2. More particularly, L2 is determined by subtracting the thickness of the solder (32) from the actual distance between the display surface (11a) and the back side of the vertical portion of the mounting fitting (30).
  • 0 ⁇ z ⁇ 1.75 is preferably or more preferably 0 ⁇ z ⁇ 1.6 or most preferably 0 ⁇ z ⁇ 1.
  • L1+b ⁇ L2, L2-b-t-1.75 ⁇ d ⁇ L2-b-t is preferably or more preferably L2-b-t-1.6 ⁇ d ⁇ L2-b-t or most preferably L2-b-t-1 ⁇ d ⁇ L2-b-t.
  • L2 and t are very low in the freedom, it is preferable to design L2, b and d in accordance with L1 and t in order to obtain the desirable z.
  • desirable z is determined by absorbing the dispersion of the dimension due to the fine adjustment of L2.
  • Fig. 6 illustrates a side view and a back view of the brightness sensor (22) and the mounting substrate (21).
  • the mounting substrate (21) is a stepped substrate in which the projected part (21b) is thicker than the base part (21a).
  • the brightness sensor (22) has a light receiving part (22a) provided at the center thereof.
  • the optical axis (Ax) of the brightness sensor (22) extends perpendicularly to the surface of the same and across the light receiving part (22a).
  • the brightness sensor (22) is sized 2 mm long, 2.1 mm wide, and 0.75 mm thick.
  • Fig. 7 is a graph showing the directivity of the sensitivity of the brightness sensor (22).
  • the sensitivity to incident light along the optical axis (Ax) is 100 %, the sensitivity is 90 % or higher to the incident light falling at an angle of 20 degrees from the optical axis (Ax) and 70 % or higher to the incident light falling at an angle of 40 degrees from the optical axis (Ax), it has very moderate directivity.
  • a fluctuation quantity of the measured brightness to the dispersion of x, y, z can be calculated and thus compensated through arithmetic operations.
  • Fig. 8 is a block diagram of a circuitry arrangement for measuring the relation of x, y to z shown in Fig. 4, and the relation of the external light to z.
  • a back light (23) is operated at a constant level. This allows the display surface (11a) to appear entirely in white.
  • Fig. 9 illustrates a resultant measurement of the first measurement.
  • 0 ⁇ z ⁇ 1.75 is preferably, more preferably 0 ⁇ z ⁇ 1.6, and most preferably 0 ⁇ z ⁇ 1.
  • the base portion (21a) of the mounting substrate (21) may be bonded at the back side by an adhesive (40) to the front side of the frame (12).
  • the distance between the display surface (11a) and the front side of the frame (12) is L1 (mm), and the height of the projected part (21b) of the mounting substrate (21) from the base portion (21a) is d (mm).
  • the thickness of the brightness sensor (22) is t (mm).
  • the distance between the surface of the brightness sensor (22) and the display surface (11a) is z (mm).
  • the thickness of the adhesive (40) is included in the distance L1. More particularly, L1 (mm) is the sum of the actual distance between the display surface (11a) and the front surface of the frame (12) and the thickness of the adhesive (40).
  • 0 ⁇ z ⁇ 1.75 is preferably or more preferably 0 ⁇ z ⁇ 1.6 or most preferably 0 ⁇ z ⁇ 1.
  • L1-t-1.75 ⁇ d ⁇ L1-t is preferably or more preferably L1-t-1.6 ⁇ d ⁇ L1-t or most preferably L1-t-1 ⁇ d ⁇ L1-t.
  • the brightness sensor (22) may be provided, which has the directivity that the sensitivity to the incident light falling at an angle of 20 degrees from the optical axis (Ax) is substantially 60 % and to the incident light falling at an angle of 40 degrees from the optical axis (Ax) is substantially 20 %.
  • the expression is 45 degree ⁇ ⁇ .
  • the brightness sensor (22) which has the directivity shown in Fig. 14 is used, it can stand the dispersion of x, y, z.
  • the brightness sensor has the directivity which the change of the directivity curve is moderate over the angle ⁇ of the incident light, it is preferable to determine W and z so that the relation is expressed by ⁇ sarctan ⁇ W/(2z) ⁇ .
  • the display device allows the brightness on its display surface to be measured accurately with a brightness sensor while controlling the effect of external light or the dispersion of the position of the installation of the brightness sensor. Accordingly, as the brightness can be maintained constant regardless of any change of the ambient temperature or any deterioration with time of the quality of the display unit, the display device can be preferably be employed for medical image diagnosis and so on.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Nonlinear Science (AREA)
  • Computer Hardware Design (AREA)
  • General Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mathematical Physics (AREA)
  • Optics & Photonics (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
EP03723231A 2003-04-28 2003-04-28 Anzeigeeinrichtung Withdrawn EP1619540A4 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2003/005494 WO2004097510A1 (ja) 2003-04-28 2003-04-28 ディスプレイ装置

Publications (2)

Publication Number Publication Date
EP1619540A1 true EP1619540A1 (de) 2006-01-25
EP1619540A4 EP1619540A4 (de) 2006-08-30

Family

ID=33398128

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03723231A Withdrawn EP1619540A4 (de) 2003-04-28 2003-04-28 Anzeigeeinrichtung

Country Status (5)

Country Link
US (1) US20060055690A1 (de)
EP (1) EP1619540A4 (de)
JP (1) JP4142651B2 (de)
CN (1) CN100374922C (de)
WO (1) WO2004097510A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7830652B2 (en) 2008-12-02 2010-11-09 Chi Lin Technology Co., Ltd Monitor and monitor correction apparatus thereof
EP2293284A1 (de) * 2009-08-27 2011-03-09 Sinitec Vertriebsgesellschaft mbH Anzeige
US9396686B2 (en) 2012-01-04 2016-07-19 Nec Display Solutions, Ltd. Display device
US9414514B2 (en) 2011-09-30 2016-08-09 Nec Display Solutions, Ltd. Display apparatus

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4393433B2 (ja) * 2005-07-29 2010-01-06 株式会社ナナオ 液晶表示装置、輝度測定方法及びコンピュータプログラム
TW200725531A (en) * 2005-12-23 2007-07-01 Innolux Display Corp Liquid crystal display and method for adjusting brightness of backlight of the liquid crystal display
CN101373283B (zh) * 2007-08-20 2010-06-16 中强光电股份有限公司 光学感测模块及使用该光学感测模块的显示装置
JP4734555B2 (ja) * 2009-07-14 2011-07-27 株式会社ナナオ センサユニット作動機構、光測定器及び画像表示装置
JP5448212B2 (ja) * 2009-08-20 2014-03-19 Ｎｅｃディスプレイソリューションズ株式会社 輝度センサ保持装置及び輝度センサ保持方法
JP4669558B1 (ja) * 2009-10-20 2011-04-13 株式会社ナナオ 表示装置、コンピュータプログラム、記録媒体及び画像表示方法
JP5319732B2 (ja) * 2011-05-20 2013-10-16 Ｅｉｚｏ株式会社 光センサユニット及び画像表示装置。
TWI496050B (zh) * 2013-08-13 2015-08-11 Quanta Comp Inc 外掛式觸控裝置
CN104460936B (zh) * 2013-09-24 2018-07-06 联想(北京)有限公司 一种控制的方法及一种电子设备
CN105334911A (zh) * 2014-06-26 2016-02-17 联想(北京)有限公司 一种电子设备
CN105913788A (zh) * 2016-06-06 2016-08-31 深圳市华星光电技术有限公司 一种液晶显示面板的侦测电路和侦测方法
CN107784932A (zh) * 2017-09-27 2018-03-09 苏州佳世达电通有限公司 显示装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5162785A (en) 1989-09-22 1992-11-10 Sextant Avionique Method and devices for optimizing the contrast and the angle of view of a liquid crystal display
DE4129846A1 (de) 1991-09-07 1993-03-11 Vdo Schindling Fluessigkristallanzeige
EP0313331B1 (de) 1987-10-23 1994-02-02 Rockwell International Corporation Echtzeit-Verfahren und -Einrichtung zum Einstellen des Kontrastverhältnisses von Flüssigkristallanzeigen
US5850205A (en) 1997-03-10 1998-12-15 Northern Telecom Limited Automatic contrast control for liquid crystal displays
EP1274066B1 (de) 2001-07-03 2008-01-30 Barco N.V. Verfahren und Einrichtung zur Echtzeitkorrektur eines Bildes

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0414013A (ja) * 1990-05-08 1992-01-20 Fujitsu Ltd 液晶表示装置および液晶表示方法
JP3222640B2 (ja) * 1993-07-08 2001-10-29 株式会社東芝 カラー受像管装置
JPH0764057A (ja) * 1993-08-25 1995-03-10 Matsushita Electric Ind Co Ltd 液晶表示装置
JPH0729526U (ja) * 1993-10-26 1995-06-02 株式会社デジタル 液晶表示装置
US6624828B1 (en) * 1999-02-01 2003-09-23 Microsoft Corporation Method and apparatus for improving the quality of displayed images through the use of user reference information
JP2002022789A (ja) * 2000-07-05 2002-01-23 Oht Inc 検査装置及び検査方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0313331B1 (de) 1987-10-23 1994-02-02 Rockwell International Corporation Echtzeit-Verfahren und -Einrichtung zum Einstellen des Kontrastverhältnisses von Flüssigkristallanzeigen
US5162785A (en) 1989-09-22 1992-11-10 Sextant Avionique Method and devices for optimizing the contrast and the angle of view of a liquid crystal display
DE4129846A1 (de) 1991-09-07 1993-03-11 Vdo Schindling Fluessigkristallanzeige
US5850205A (en) 1997-03-10 1998-12-15 Northern Telecom Limited Automatic contrast control for liquid crystal displays
EP1274066B1 (de) 2001-07-03 2008-01-30 Barco N.V. Verfahren und Einrichtung zur Echtzeitkorrektur eines Bildes

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2004097510A1

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7830652B2 (en) 2008-12-02 2010-11-09 Chi Lin Technology Co., Ltd Monitor and monitor correction apparatus thereof
EP2293284A1 (de) * 2009-08-27 2011-03-09 Sinitec Vertriebsgesellschaft mbH Anzeige
US9414514B2 (en) 2011-09-30 2016-08-09 Nec Display Solutions, Ltd. Display apparatus
US9396686B2 (en) 2012-01-04 2016-07-19 Nec Display Solutions, Ltd. Display device

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Publication number Publication date
WO2004097510A1 (ja) 2004-11-11
CN1771458A (zh) 2006-05-10
JPWO2004097510A1 (ja) 2006-07-13
JP4142651B2 (ja) 2008-09-03
US20060055690A1 (en) 2006-03-16
CN100374922C (zh) 2008-03-12
EP1619540A4 (de) 2006-08-30

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